Is it possible to delete an incorrect cast member listing from an entire series?

I may be missing something obvious.  I was able to remove Jo Joyner from episode 1 of Green Wing (TV Series 2004–2007) - IMDb without trouble (#220402-044922-479000).  But I don't see a way to remove her from all 18 episodes without entering 17 more submissions.  (On the title page both Sally Bretton, who played the role, and Jo Joyner, who is never in the series, are credited for the character Kim Alabaster in every episode.  I went through the end credits on DVD, which I had watched a few years ago, to verify Joyner isn't there.  No other characters are double listed.)

Is there some simple way to do this at the series level?  Or even at the season level?